Good to hear that last bit
The HWC fills from the bottom, drains from the top. When you open a hot tap, the pressure from the cold feed atthe bottom forces hot water out the top of the tank. Ideal really as the water at the top is the hottest within the tank. Where dual coil immersion elements are used, the shorter 'sink' coil only heats the top portion of the tank.
Leo
ONQ you're not stopping to think about this......
As water is drawn from the HWC it is (normally) forced out by the driving water from the header tank.
The amount drawn off equals the amount "gravity fed" in. Therefore, remove the "driving force" (by whatever means) and no water will flow through the HWC ie. it remains full, no matter how many taps are open.
Hi.
Just to keep the discussion going , would it be correct to say that with prolonged use of the heating AND an empty attic tank the water in the cylinder would eventually evaporate resulting in damage to the cylinder ?
w200
No damage would be done to cylinder. the only problem that may occur is if a house has leaks that have went unnoticed as the header tank (small tank) in attic normally refilled itself. After a prolonged absence of water, the heating system may become empty, even then stat at boiler would shut it done before any real damage could occur, real damage being a burnt out pump.
Oh and Sorry ONQ for the short answer last night, I finished work at 11pm, If I never see another frozen/burst pipe it will be too soon.
Nice to learn something again.
I say again because I'm sure I discussed this with someone before [a plumber no doubt] and knew it, but forgot it.
Thanks Leo.
ONQ.
I presume there is some sort of valve at the base ot drain it off it work is necessary on the tank.
Hi.
Just to keep the discussion going , would it be correct to say that with prolonged use of the heating AND an empty attic tank the water in the cylinder would eventually evaporate resulting in damage to the cylinder ?
w200
Did you ever find out if you could use the oil heating in the end?Villa 1, I think you hit the nail on the head, Bob the builder did not put them down far enough hence our problem. Still not heard from plumber!
The primary system for the rads and hot water does not empty unless specifically drained, it is a different header tank to the hot water tank or a sealed recirculating systemHow do you know the HWC has water in it?
ONQ.
After 11 years i'd say she's flowing soundlyDid you ever find out if you could use the oil heating in the end?
The primary system for the rads and hot water does not empty unless specifically drained, it is a different header tank to the hot water tank or a sealed recirculating system
Still going ........ JustCynic that I am, I wondered how many of the original contributors to this thread are now deceased...
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